Hitachi H8S/2646 Hardware Manual page 393

• Phase counting mode 3
Figure 10-31 shows an example of phase counting mode 3 operation, and table 10-11
summarizes the TCNT up/down-count conditions.
TCLKA (channels 1 and 5)
TCLKC (channels 2 and 4)
TCLKB (channels 1 and 5)
TCLKD (channels 2 and 4)
TCNT value
Figure 10-31 Example of Phase Counting Mode 3 Operation
Table 10-11 Up/Down-Count Conditions in Phase Counting Mode 3
TCLKA (Channels 1 and 5)
TCLKC (Channels 2 and 4)
High level
Low level
High level
Low level
Legend
: Rising edge
: Falling edge
Up-count
TCLKB (Channels 1 and 5)
TCLKD (Channels 2 and 4)
Low level
High level
High level
Low level
Down-count
Time
Operation
Don't care
Don't care
Don't care
Up-count
Down-count
Don't care
Don't care
Don't care
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